Ontario County routes are not posted with the standard pentagon shields.
However, the official name of each highway is simply "County Road xx".
Alternate or former road names have in many cases been dropped from the
common parlance. Those names still in occasional usage are listed in the
"Notes" column.

Ontario County maintains but a small percentage of its highways, with
most roads being assinged to the Towns. County highways are in most cases
long-distance arterial roads.

No county roads enter any City or Village in Ontario County.
Italicized
routes are obsolete designations.